Showmax Subscription Con

I was watching on my Showmax account on a smart TV at an AirBnb and wanted to watch the rugby world cup final. I was prompted to upgrade my account on the TV by Showmax. Having done this, and been billed R225, I was then told I could only watch Showmax on mobile devices from now on. Not just sport, but all content. I then attempted to revert my account back, I was billed a further R99 but I still can't watch content on my TV. Upon contacting customer services I was told that changing the plan is not immediate (can't say I recall seeing that detailed on my TV) and that change will only occur at the end of the month. Customer service flat out refused to do anything and told me its "the law" that they can keep my money. I'm going to try and get my money back via the bank, but not holding my breath.